New constraints on neutrino physics from Boomerang data
arXiv:astro-ph/0005018 · doi:10.1103/PhysRevLett.85.4203
Abstract
We have performed a likelihood analysis of the recent data on the Cosmic Microwave Background Radiation (CMBR) anisotropy taken by the Boomerang experiment. We find that this data places a strong upper bound on the radiation density present at recombination. Expressed in terms of the equivalent number of neutrino species the bound is N_nu < 13, and the standard model prediction, N_nu = 3.04, is completely consistent the the data. This bound is complementary to the one found from Big Bang nucleosynthesis considerations in that it applies to any type of radiation, i.e. it is not flavour sensitive. It also applies to the universe at a much later epoch, and as such places severe limits on scenarios with decaying neutrinos. The bound also yields a firm upper limit on the lepton asymmetry in the universe.
4 pages, 2 postscript figures, matches version to appear in PRL
References in corpus (8)
- A Flat Universe from High-Resolution Maps of the Cosmic Microwave Background Radiation
- New CMB constraints on the cosmic matter budget: trouble for nucleosynthesis?
- Cosmological implications of a Relic Neutrino Asymmetry
- Measuring the cosmological lepton asymmetry through the CMB anisotropy
- Remarks on the Boomerang results, the baryon density and the leptonic asymmetry
- Improved Treatment of Cosmic Microwave Background Fluctuations Induced by a Late-decaying Massive Neutrino
- Stochastic optimization methods for extracting cosmological parameters from CMBR power spectra
- Probing neutrino decays with the cosmic microwave background
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